CN101560108A - Method for sintering high-performance permanent magnetic ferrite material by coal kiln - Google Patents
Method for sintering high-performance permanent magnetic ferrite material by coal kiln Download PDFInfo
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- CN101560108A CN101560108A CNA2009100986043A CN200910098604A CN101560108A CN 101560108 A CN101560108 A CN 101560108A CN A2009100986043 A CNA2009100986043 A CN A2009100986043A CN 200910098604 A CN200910098604 A CN 200910098604A CN 101560108 A CN101560108 A CN 101560108A
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- sintering
- permanent magnetic
- magnetic ferrite
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Abstract
The invention relates to a method for sintering a high-performance permanent magnetic ferrite material by a coal kiln, which comprises the following steps that: a formula material of a permanent magnetic ferrite is produced into honeycomb cakes, the honeycomb cakes are loaded on a refractory pushing plate in a sintering hole of a gas-fired kiln according to a horizontal mode, and the refractory pushing plate loaded with the honeycomb cakes is gradually pushed to high temperature from normal temperature according to certain speed and then enters a temperature-reducing cooling area until the refractory pushing plate comes out of the kiln to finish the whole presintering process; and a quantitative coal feeder feeds coal, the complete combustion is maintained to furthest control CO2 in the kiln, the coal is combusted in a hearth in the kiln, the honeycomb cakes are isolated from the hearth in a sintering cavity, the permanent magnetic ferrite is subjected to solid phase reaction through radiant heat and is pushed out by a pusher, and the continuous operation is performed. The method has the advantages of reasonable process, novel design, good stability, large yield, wide applicable temperature range, convenient popularization and the like.
Description
Technical field
The present invention relates to the sintering method of permanent ferrite prefiring material, mainly is a kind of method of sintering high-performance permanent magnetic ferrite material by coal kiln.
Background technology
The pre-imitation frosted glass of high-performance permanent-magnet ferrite, through broken, moulding, sintering, mill processing, inspection divide, pack, make the permanent-magnet ferrite element.Be used for the electric motor of automobile excitation function, also be used for computer, communication equipment, advanced audio, electric mechanical.Satisfy the development need of the growing power of China, electronics, electronics and information industry.
The pre-imitation frosted glass of original high-performance permanent-magnet ferrite is the rotary kiln pre-burning of adopting electric tunnel furnace pre-burning or adopting burning petroleum.Consumed power and petroleum resources are more.All there are stability problem in its output and performance.
Summary of the invention
The present invention solves power consumption in the existing manufacture method, consumption petroleum resources and stability problem, and the method for the sintering high-performance permanent magnetic ferrite material by coal kiln that a kind of stability is high, performance index are high is provided.
The present invention solves the technical scheme that its technical problem adopts: the method for this sintering high-performance permanent magnetic ferrite material by coal kiln, step is as follows: the formulation material of permanent-magnet ferrite is made cellular cake, by horizontal mode in gas fired kiln sintering hole in the fire-resistant push pedal, progressively push the fire-resistant push pedal that cellular cake is housed to high temperature by certain speed by normal temperature and enter the cooling cooling zone again, until kiln discharge, finish the pre-burning process of having put in order; Quantitatively coal feeder advances coal, and keeping fully, burning solves the CO that controls to greatest extent in the kiln
2, the burner hearth internal combustion of coal in kiln, cellular cake is isolated with burner hearth in the sintering chamber, carries out solid state reaction by radiant heat for permanent-magnet ferrite, and is released operate continuously by pusher.
As preferably, described honeycomb cake is Φ 100mm * 100m, and good permeability meets the sintering in oxidizing atmosphere of processing requirement and dress base mode thereof.
As preferably, described fire-resistant push pedal is to bear the plate that the refractory materials of cellular cake weight and calcined temperature maximum permissible temperature is made, and is of a size of 400 * 400 * 30mm;
As preferably, adopt preheating warm area, high-temperature zone (heat preservation zone), cooling area equipment to meet the temperature curve of the requirement of pre-burning reaction, and corresponding advancing the plate time, reach the sintering effect of optimum regime.
As preferably, described gas fired kiln adopts four hole tunnel furnace.
The invention has the advantages that: it is reasonable that the present invention has technology, modern design, and good stability, output is big, and broad application temperature range is convenient to characteristics such as popularization.For the permanent-magnet ferrite manufacturing provides a kind of sintering method.The magnetic parameter index is Br 〉=400mT, Hcj 〉=320KA/m.The present invention solves simultaneously when performance reaches the high target requirement, and output also can mass production.
Embodiment
Below in conjunction with embodiment the present invention is further described, but should understand these embodiment limits the scope of the invention, under the situation of the spirit and scope of the present invention, those skilled in the art can make changes and improvements so that it is fit to different service conditions, condition and embodiment to the present invention.
Embodiment 1:KV4141 permanent ferrite prefiring material is by Fe
2O
3: SrCO
3Prepare burden at=6: 1, and other adds CaCO
3And SiO
2Respectively be 0.5% and 0.3% to mix, add by 8% moisture content simultaneously and stir, on the honeycomb machine, be pressed into cake Φ 100 * 100mm, the push pedal of packing into is of a size of in the four hole kilns of 400 * 400 * 30mm in the push pedal, 4 * 3 of lower floors, 4 * 3 in middle level, 3 * 3 on upper strata, the temperature curve by setting is advanced by 50～70 minutes/plate speed, solid state reaction takes place through the high-temperature zone, generate permanent ferrite prefiring material, the outward appearance of material is crystallite, beige, after technologies such as second batch pulverizing, moulding, sintering, mill processing, magnetic property reaches Br 〉=400mT, Hcj 〉=320KA/m.This KV4141 material belongs to the top grade material of international most advanced level, and domestic colleague producer does not see that the special process of this material requires to be adapted at sintering in this kind kiln, and this answers the high end equipment sintering that identical thinking is arranged with traditional top grade material.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1, a kind of method of sintering high-performance permanent magnetic ferrite material by coal kiln, it is characterized in that: step is as follows: the formulation material of permanent-magnet ferrite is made cellular cake, by horizontal mode in gas fired kiln sintering hole in the fire-resistant push pedal, progressively push the fire-resistant push pedal that cellular cake is housed to high temperature by certain speed by normal temperature and enter the cooling cooling zone again, until kiln discharge, finish the pre-burning process of having put in order; Quantitatively coal feeder advances coal, the burner hearth internal combustion of coal in kiln, and cellular cake is isolated with burner hearth in the sintering chamber, carries out solid state reaction by radiant heat for permanent-magnet ferrite.
2, the method for sintering high-performance permanent magnetic ferrite material by coal kiln according to claim 1 is characterized in that: described honeycomb cake is Φ 100mm * 100m.
3, the method for sintering high-performance permanent magnetic ferrite material by coal kiln according to claim 1 is characterized in that: described fire-resistant push pedal is to bear the plate that the refractory materials of cellular cake weight and calcined temperature maximum permissible temperature is made.
4, the method for sintering high-performance permanent magnetic ferrite material by coal kiln according to claim 1 is characterized in that: described gas fired kiln adopts four hole tunnel furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100986043A CN101560108A (en) | 2009-05-18 | 2009-05-18 | Method for sintering high-performance permanent magnetic ferrite material by coal kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100986043A CN101560108A (en) | 2009-05-18 | 2009-05-18 | Method for sintering high-performance permanent magnetic ferrite material by coal kiln |
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| Publication Number | Publication Date |
|---|---|
| CN101560108A true CN101560108A (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100986043A Pending CN101560108A (en) | 2009-05-18 | 2009-05-18 | Method for sintering high-performance permanent magnetic ferrite material by coal kiln |
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| CN (1) | CN101560108A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292595A (en) * | 2013-06-13 | 2013-09-11 | 浙江凯文磁钢有限公司 | Device and method for sintering high-performance permanent magnetic ferrite products |
| CN104291833A (en) * | 2014-09-18 | 2015-01-21 | 浙江凯文磁钢有限公司 | Method of sintering permanent magnetic ferrite by utilizing coal gas |
| CN108242337A (en) * | 2018-01-17 | 2018-07-03 | 佛山市川东磁电股份有限公司 | A kind of soft magnetism sintering process |
-
2009
- 2009-05-18 CN CNA2009100986043A patent/CN101560108A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292595A (en) * | 2013-06-13 | 2013-09-11 | 浙江凯文磁钢有限公司 | Device and method for sintering high-performance permanent magnetic ferrite products |
| CN104291833A (en) * | 2014-09-18 | 2015-01-21 | 浙江凯文磁钢有限公司 | Method of sintering permanent magnetic ferrite by utilizing coal gas |
| CN108242337A (en) * | 2018-01-17 | 2018-07-03 | 佛山市川东磁电股份有限公司 | A kind of soft magnetism sintering process |
| CN108242337B (en) * | 2018-01-17 | 2020-07-17 | 佛山市川东磁电股份有限公司 | Soft magnetic sintering process |
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Application publication date: 20091021 |